Alert archive / Texas / Frost Advisories in 2018

Frost Advisory 3, NWS Amarillo, TX

April 26, 20184 counties in Texas; Cimarron County, Texas County, Oklahoma

NWS Amarillo, TX issued this frost advisory at Apr 26, 2018, 3:40 PM CDT for 4 counties in Texas; Cimarron County, Texas County, Oklahoma. It took effect at Apr 27, 2018, 3:00 AM CDT. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued: Apr 26, 2018, 3:40 PM CDT (20:40 UTC)
In effect from: Apr 27, 2018, 3:00 AM CDT
Expired: Apr 27, 2018, 8:00 AM CDT
In force: 5 hr
Issued by: NWS Amarillo, TX

Counties Cimarron County, OK, Texas County, OK, Dallam County, TX, Hartley County, TX, Moore County, TX, Sherman County, TX

The radar

The Amarillo radar (KAMA), 124 km from the middle of the area, began a volume at 20:42 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 8.7 hours before the alert went out and 125 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2410 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 170 m²/s²
0-3 km storm-relative helicity: 208 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this frost advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Amarillo, TX wrote its last area forecast discussion before this frost advisory went out at Apr 26, 2:50 PM CDT, 50 minutes earlier.

Area forecast discussion, Apr 26, 2:50 PM CDT, 50 minutes before

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Hazardous weather outlook, Apr 26, 3:21 PM CDT, 19 minutes before

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In the hours before

Local storm report, Apr 26, 1:21 PM CDT, 2 hours 19 minutes before

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  <main class="wrap">
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      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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The office that day

Everything else NWS Amarillo, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 26, 10:54 AM CDT	Wind Advisory	AMA	Dallam, Hartley, Moore, Sherman	5 hr

Nearby

Frost Advisories in Texas, 2018 Frost Advisories in Oklahoma, 2018 Every frost advisory in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.